ikkysleepy,

I think you may want to email Store with this issue as kai_en is the third user to face the same thing. This means most probably Store have screwed up somewhere as MeeGoal too just 2 days ago had the same issue...

The developer uploaded v0.7.3, Store updated the version number but the installation was of v0.6.0 hence it kept giving errors and installing it via /var/cache/apt/archives/partial was the solution...